cc: Make most of cc::OutputSurface abstract.

cc/output/output_surface_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/output/output_surface.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "cc/output/compositor_frame.h"
@@ skipping 11 matching lines @@
 class TestOutputSurface : public OutputSurface {
  public:
   explicit TestOutputSurface(
       scoped_refptr<TestContextProvider> context_provider)
       : OutputSurface(std::move(context_provider)) {}
 
   explicit TestOutputSurface(
       std::unique_ptr<SoftwareOutputDevice> software_device)
       : OutputSurface(std::move(software_device)) {}
 
+  void EnsureBackbuffer() override {}
+  void DiscardBackbuffer() override {}
+  void BindFramebuffer() override {}
   void SwapBuffers(CompositorFrame frame) override {
     client_->DidSwapBuffersComplete();
   }
   uint32_t GetFramebufferCopyTextureFormat() override {
     // TestContextProvider has no real framebuffer, just use RGB.
     return GL_RGB;
   }
+  OverlayCandidateValidator* GetOverlayCandidateValidator() const override {
+    return nullptr;
+  }
+  bool IsDisplayedAsOverlayPlane() const override { return false; }
+  unsigned GetOverlayTextureId() const override { return 0; }
+  bool SurfaceIsSuspendForRecycle() const override { return false; }
+  bool HasExternalStencilTest() const override { return false; }
+  void ApplyExternalStencil() override {}
 
   void OnSwapBuffersCompleteForTesting() { client_->DidSwapBuffersComplete(); }
 
  protected:
 };
 
 class TestSoftwareOutputDevice : public SoftwareOutputDevice {
  public:
   TestSoftwareOutputDevice();
   ~TestSoftwareOutputDevice() override;
@@ skipping 21 matching lines @@
 }
 
 void TestSoftwareOutputDevice::EnsureBackbuffer() {
   SoftwareOutputDevice::EnsureBackbuffer();
   ensure_backbuffer_count_++;
 }
 
 TEST(OutputSurfaceTest, ContextLossInformsClient) {
   scoped_refptr<TestContextProvider> provider = TestContextProvider::Create();
   TestOutputSurface output_surface(provider);
-  EXPECT_FALSE(output_surface.HasClient());
 
   FakeOutputSurfaceClient client;
   EXPECT_TRUE(output_surface.BindToClient(&client));
-  EXPECT_TRUE(output_surface.HasClient());
 
   // Verify DidLoseOutputSurface callback is hooked up correctly.
   EXPECT_FALSE(client.did_lose_output_surface_called());
   output_surface.context_provider()->ContextGL()->LoseContextCHROMIUM(
       GL_GUILTY_CONTEXT_RESET_ARB, GL_INNOCENT_CONTEXT_RESET_ARB);
   output_surface.context_provider()->ContextGL()->Flush();
   EXPECT_TRUE(client.did_lose_output_surface_called());
 }
 
 // TODO(danakj): Add a test for worker context failure as well when
 // OutputSurface creates/binds it.
 TEST(OutputSurfaceTest, ContextLossFailsBind) {
   scoped_refptr<TestContextProvider> context_provider =
       TestContextProvider::Create();
 
   // Lose the context so BindToClient fails.
   context_provider->UnboundTestContext3d()->set_context_lost(true);
 
   TestOutputSurface output_surface(context_provider);
-  EXPECT_FALSE(output_surface.HasClient());
 
   FakeOutputSurfaceClient client;
   EXPECT_FALSE(output_surface.BindToClient(&client));
-  EXPECT_FALSE(output_surface.HasClient());
-}
-
-TEST(OutputSurfaceTest, SoftwareOutputDeviceBackbufferManagement) {
-  auto device_owned = base::MakeUnique<TestSoftwareOutputDevice>();
-  TestSoftwareOutputDevice* software_output_device = device_owned.get();
-
-  // TestOutputSurface now owns software_output_device and has responsibility to
-  // free it.
-  TestOutputSurface output_surface(std::move(device_owned));
-
-  EXPECT_EQ(0, software_output_device->ensure_backbuffer_count());
-  EXPECT_EQ(0, software_output_device->discard_backbuffer_count());
-
-  output_surface.EnsureBackbuffer();
-  EXPECT_EQ(1, software_output_device->ensure_backbuffer_count());
-  EXPECT_EQ(0, software_output_device->discard_backbuffer_count());
-  output_surface.DiscardBackbuffer();
-
-  EXPECT_EQ(1, software_output_device->ensure_backbuffer_count());
-  EXPECT_EQ(1, software_output_device->discard_backbuffer_count());
 }
 
 }  // namespace
 }  // namespace cc